<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2009 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
// $Id$

class Page extends Think {
    // 起始行数
    public $firstRow	;
    // 列表每页显示行数
    public $listRows	;
    // 页数跳转时要带的参数
    public $parameter  ;
    // 分页总页面数
    protected $totalPages  ;
    // 总行数
    protected $totalRows  ;
    // 当前页数
    protected $nowPage    ;
    // 分页的栏的总页数
    protected $coolPages   ;
    // 分页栏每页显示的页数
    protected $rollPage   ;
	// 分页显示定制
    protected $config  =	array('theme'=>'    %prePage%  %linkPage%  %nextPage%');

    /**
     +----------------------------------------------------------
     * 架构函数
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param array $totalRows  总的记录数
     * @param array $listRows  每页显示记录数
     * @param array $parameter  分页跳转的参数
     +----------------------------------------------------------
     */
    public function __construct($totalRows,$listRows,$parameter='') {
        $this->totalRows = $totalRows;
        $this->parameter = $parameter;
        $this->rollPage = 20;
        $this->listRows = !empty($listRows)?$listRows:C('PAGE_LISTROWS');
        $this->totalPages = ceil($this->totalRows/$this->listRows);     //总页数
        $this->coolPages  = ceil($this->totalPages/$this->rollPage);
        $this->nowPage  = !empty($_GET[C('VAR_PAGE')])?$_GET[C('VAR_PAGE')]:1;
        if(!empty($this->totalPages) && $this->nowPage>$this->totalPages) {
            $this->nowPage = $this->totalPages;
        }
        $this->firstRow = $this->listRows*($this->nowPage-1);
    }

    public function setConfig($name,$value) {
        if(isset($this->config[$name])) {
            $this->config[$name]    =   $value;
        }
    }

    /**
     +----------------------------------------------------------
     * 分页显示输出
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     */
    public function show($url) {
        if(0 == $this->totalRows) return '';
        $p = C('VAR_PAGE');
        $nowCoolPage      = ceil($this->nowPage/$this->rollPage);
        //$url  =  $_SERVER['REQUEST_URI'].(strpos($_SERVER['REQUEST_URI'],'/')?'':"/").$this->parameter;
        //$parse = parse_url($url);
        //dump($this->nowPage);
        
        
  $xia='';
  $shang='';
  
  if ($this->nowPage==2){
  
    $shang="<a href='".$url."'>上一页</a>";
    $xia="<a href='".$url."-p-".($this->nowPage+1)."'>下一页</a>";
  
  }else if($this->nowPage==$this->totalPages && $this->nowPage != 1 && $this->totalPages != 1){

   $shang="<a href='".$url."-p-".($this->nowPage-1)."'>上一页</a>";
   $xia='';
  }else if($this->nowPage==1 and $this->totalPages == 1 ){

   $shang='';
   $xia='';
  }else if($this->nowPage==1){

   $shang="";
   $xia="<a href='".$url."-p-".($this->nowPage+1)."'>下一页</a>";
  }else{
   $shang="<a href='".$url."-p-".($this->nowPage-1)."'>上一页</a>";
   $xia="<a href='".$url."-p-".($this->nowPage+1)."'>下一页</a>";
  }


        //上下翻页字符串
        $upRow   = $this->nowPage-1;
        $downRow = $this->nowPage+1;
        if ($upRow>0){
            $upPage="<a href='".$url."-".$p."-$upRow'>".$this->config['prev']."</a>";
        }else{
            $upPage="";
        }

        if ($downRow <= $this->totalPages){
            $downPage="<a href='".$url."-".$p."-$downRow'>".$this->config['next']."</a>";
        }else{
            $downPage="";
        }
        // << < > >>
        if($nowCoolPage == 1){
            $theFirst = "";
            $prePage = "";
        }else{
            $preRow =  $this->nowPage-$this->rollPage;
            $prePage = "<a href='".$url."-".$p."-$preRow' >上".$this->rollPage."页</a>";
            $theFirst = "<a href='".$url."' >首页</a>";
        }
        if($nowCoolPage == $this->coolPages){
            $nextPage = "";
            $theEnd="";

        }else{
            $nextRow = $this->nowPage+$this->rollPage;
            $theEndRow = $this->totalPages;
            $nextPage = "<a href='".$url."-".$p."-$nextRow' >下".$this->rollPage."页</a>";
            $theEnd = "<a href='".$url."-".$p."-$theEndRow' >尾页</a>";

        }
        // 1 2 3 4 5
        $linkPage = "";
        for($i=1;$i<=$this->rollPage;$i++){
            $page=($nowCoolPage-1)*$this->rollPage+$i;
            if($page!=$this->nowPage){
                if($page<=$this->totalPages){
                    if($page==1){
                    $linkPage .= "&nbsp;<a href='".$url."'>".$page."</a>";
                    }else{
                    $linkPage .= "&nbsp;<a href='".$url."-".$p."-$page'>".$page."</a>";
                    }
                }else{
                    break;
                }
            }else{
                if($this->totalPages != 1){
                    $linkPage .= "<a class='act' href='javascript:void(0)'>".$page."</a>";
                }
            }
        }
        $pageStr	 =$theFirst."".$shang."".$prePage."".$linkPage."".$nextPage."".$theEnd."".$xia;	/* str_replace(
            array('%header%','%nowPage%','%totalRow%','%totalPage%','%upPage%','%downPage%','%first%','%prePage%','%linkPage%','%nextPage%','%end%'),
            array($this->config['header'],$this->nowPage,$this->totalRows,$this->totalPages,$upPage,$downPage,$theFirst,$prePage,$linkPage,$nextPage,$theEnd),$this->config['theme']);*/
        return $pageStr;
    }

}
?>
